1 /* 2 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.gc.shared; 26 27 import java.util.*; 28 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.gc.cms.*; 31 import sun.jvm.hotspot.gc.serial.*; 32 import sun.jvm.hotspot.runtime.*; 33 import sun.jvm.hotspot.types.*; 34 35 /** Factory containing a VirtualConstructor suitable for instantiating 36 wrapper objects for all types of generations */ 37 38 public class GenerationFactory { 39 private static VirtualConstructor ctor; 40 41 static { 42 VM.registerVMInitializedObserver(new Observer() { 43 public void update(Observable o, Object data) { 44 initialize(VM.getVM().getTypeDataBase()); 45 } 46 }); 47 } 48 49 private static synchronized void initialize(TypeDataBase db) { 50 ctor = new VirtualConstructor(db); 51 52 ctor.addMapping("DefNewGeneration", DefNewGeneration.class); 53 ctor.addMapping("ParNewGeneration", ParNewGeneration.class); 54 ctor.addMapping("TenuredGeneration", TenuredGeneration.class); 55 ctor.addMapping("ConcurrentMarkSweepGeneration", ConcurrentMarkSweepGeneration.class); 56 } 57 58 public static Generation newObject(Address addr) { 59 try { 60 return (Generation) ctor.instantiateWrapperFor(addr); 61 } catch (WrongTypeException e) { 62 return new Generation(addr) { 63 public String name() { 64 return "unknown generation type"; 65 } 66 public void spaceIterate(SpaceClosure blk, boolean usedOnly) { 67 } 68 public void printOn(java.io.PrintStream tty) { 69 tty.println("unknown subtype of Generation @ " + getAddress() + " (" + 70 virtualSpace().low() + "," + virtualSpace().high() + ")"); 71 } 72 public long used() { 73 return 0; 74 } 75 public long free() { 76 return 0; 77 } 78 public long capacity() { 79 return 0; 80 } 81 public long contiguousAvailable() { 82 return 0; 83 } 84 85 }; 86 } 87 } 88 }